Fire suppression & interlocks
The canopy over your cookline is worked on by three different trades - the extraction cleaner, the suppression engineer and the gas fitter - and getting them in the right order means each builds on the last rather than undoing it or forcing a second shutdown.
The short answer
The canopy over your cookline is worked on by three different trades - the extraction cleaner, the suppression engineer and the gas fitter - and getting them in the right order means each builds on the last rather than undoing it or forcing a second shutdown.
The detail
The TR19 extraction clean degreases the canopy, filters, plenum and duct. The BAFE SP206 suppression service inspects, tests and recharges the wet chemical system in that same canopy. The Gas Safe engineer maintains the appliances and the interlock that ties gas to airflow. All three touch the same few square metres above the cookline.
Left uncoordinated, they collide. A suppression system usually has to be put into a safe, isolated state before heavy cleaning near its nozzles and detection line, then reset afterwards - so cleaning after a suppression service can mean the system is disturbed again straight after it was certified. Order matters.
The sensible sequence is generally to clean first, then service the suppression on the degreased canopy, with the gas and interlock work fitted around them. The cleaner leaves a degreased environment; the suppression engineer certifies it in that clean state; the gas engineer confirms the interlock proves airflow on a restored extract.
Each trade also needs the others isolated for safety. Suppression is put into service mode so it cannot discharge during cleaning; gas is isolated where appliances are being worked on. Planning the visits together lets those isolations happen once, in a single window, rather than repeatedly.
What it means for you
The practical goal is one planned shutdown that covers all three, in the order that makes each effective: clean, then certify suppression, with gas and interlock checks slotted in. That minimises the time the kitchen is down and stops one trade disturbing another's finished work.
It also produces records that agree with each other. A TR19 post-clean report, a suppression Certificate of Conformance and a current gas safety record, dated in a sensible order, describe a system that was maintained as a whole - which is what a fire risk assessor or insurer wants to see.
Coordinating does not mean one contractor does everything; it means someone holds the plan so the specialists arrive in the right order. The extraction clean is usually the natural anchor, because so much of the other work is easier and safer on a degreased canopy.
The service behind the guide
Sibling guides
What insurers expect at the intersection · Fire safety, not just hygiene · Cleaning without closing
Questions
Usually three: the TR19 extraction cleaner, the BAFE SP206 suppression engineer and the Gas Safe fitter who maintains the appliances and interlock. All three work on the same canopy over the cookline.
Generally clean first, then service the suppression on the degreased canopy, with gas and interlock checks fitted around them. That way each trade builds on the last rather than disturbing finished work. A short call between the contractors to agree the running order usually heads off the common clashes.
Because heavy cleaning near the nozzles and detection line usually means putting the suppression system back into a disturbed state right after it was certified. Cleaning first avoids re-disturbing a just-serviced system.
Not usually - they are separate specialisms. What matters is that someone coordinates the plan so the trades arrive in the right order and the necessary isolations happen once, in a single window.
To cut downtime and keep the records coherent. One planned shutdown covering all three, dated in a sensible order, is cheaper for the kitchen and reads as a properly maintained system to assessors and insurers. It also means the kitchen loses service only once, rather than closing around three separate call-outs.
Phoenix Duct Clean · by the numbers
Phoenix Duct Clean degreases the whole extraction system first, so your suppression and gas engineers arrive to a clean canopy and the whole visit happens in one planned window.